Before taking over the top spot at Hewlett-Packard, Leo Apotheker was CEO of SAP, the German business-software maker now on trial over corporate espionage allegations from Oracle. But HP says Apotheker won't testify at the trial.

Jury selection for a major copyright case involving Oracle and its smaller competitor SAP started in Oakland, Calif., on Monday, marking the beginning of a trial between the two software rivals that's been more than two years in the making

Hewlett-Packard (HPQ) is suing its former chief executive, Mark Hurd, after news that he will be taking the post of co-president at competitor Oracle (ORCL). HP alleges that Hurd could end up violating confidentiality agreements by accepting the position.